Breathing filter



FIG. 1 is a top perspective view of the breathing filter of the presentinvention.

FIG. 2 is a front elevation view of the breathing filter shown in FIG.1, the back elevation view of the breathing filter being identicalthereto.

FIG. 3 is a top plan view of the breathing filter shown in FIG. 1.

FIG. 4 is a side elevation view showing a side of the breathing filtershown in FIG. 1, the opposite side elevation view of the breathingfilter being identical thereto.

FIG. 5 is a bottom plan view of the breathing filter shown in FIG. 1;and,

FIG. 6 is a bottom perspective view of the breathing filter shown inFIG. 1.

The ornamental design for a breathing filter, as shown and described.